Jeweller s tool



l of Sturgis,

' flat side of the pin (it there be UNITED STATES CHARLES N. FAIRBANKS,

OF STURGIS, MICHIGAN.

J EWEL ERS TOOL.

SPECIFICATION forming part: of Letters Patent No, 271,051, dated January 23, 1883.

Application filed August 21,1882. (No model.) i

To all whom it may concern: 7

Be it known thatI, CHARLES N. FAIRBANKS, in the county of St. Joseph and State of Michigan, have invented certain new and useful Improvements in Jewelers Tools; and ldo hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to that class of jewed rs tools known as ruby-pin setters, the object being to provide a tool adapted to accurately set the ruby-pin on the roller-table or 'collet of a watch.

The invention consists in a tool of the improved construction hereinafterfully described, and pointed out in the claims, whereby the ruby-pin may be accurately adjusted Without removing the roller-table from the balancewheel, thus avoiding the springing of the latter out of true.

In the drawings, Figure l is a side elevation of my improved tool. Fig. 2 is a plan view of the same. Fig. 3 represents the ruby-pin attached'to the roller-table, and Fig. 4 shows the roller-table in position on the balancewheel.

A represents a ring of spring metal, split transversely at the point a to allow the ring to be forced open.

B B repiesent handles rigidly secured to the ring on opposite sides, as shown, and adapted, when pressed together, to force the ring open.

. C 0 represent plates secured to the ring A, one on each side of the opening a, to form clamping-jaws. The jaw O is provided with tuo parallel slots, D D, the slot D being slightly wider than the slot D. The inner ends of these slots are slightly beveled to form notches d d, while their outer ends are formed circular, as shown at d d.

The operation of the device is as follows: When the collet is separate from the balancewheel the jaws G U are forced apart by pressure on the handles of the tool, and the rubypin is placed in position between thejaws, the one) being placed against the plain jaw O, and the round side entering the notch in the jaw G at the inner end of the slot D,.where it is held socurely by the closing of the jaws upon removing the pressure on the handles. The rollertable is then placed upon the ruby-pin, the pin passing up into the opening at the edge of the roller-table, and the pin is made true by pass- A in g a needle through the hole in the center of the roller-table into the slot D. The ruby-pin and roller-table are then fastened together With cement or shellac in the usual manner.

The use of the needle may be omitted and the table adjusted by the eye, the slot D forming a line or guide for that purpose. When the roller-table is attached to the balancewheel the ruby-pin is placed in position in the jaws opposite the slot D in the same manner as before described. The staff of the balancewheel will pass through the slot D, holding the parts in proper position, and the fastening of the pin is then identical with t at already described.

The circular ends cl d of the slots are designed for convenience in placing the staff of the balance-wheel in position in the slots. The staff is inserted into the circular end, and then slipped into the narrow portion of the slot. These circular ends may be omitted without affecting the -gist of the invention; but I prefer to form the slots, as shown, for the purpose named. Thus it will be seen that the ruby-pin may be accurately set without removing the,

roller-table from the lmlance-wheel.

Having fully described my invention, what I claim asnew, and desire to secure by Letters Patent, is-

1. A jewelers tool for setting ruby-pins, consisting essentially of an open ring having handles connected therewith, said ring being provided with jaws having slots for clamping and setting the ruby-pin, substantially as set forth.

2. In a rubypin setter, the combination, with the open ring and handles, of clampingjaws, one of which is provided with two slots open at one end and having the open end beveled, substantially as set forth.

3. 'In a ruby-pin setter, the combination, with the open spring-ring and handles, of clamping-jaws, one of which is provided with two slots open at one end and beveled at their open ends, the inner ends of the slots being circular, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CHARLES N. FAIRBANKS.

Witnesses:

J AS. W. BECK, Y H. I). ANTHONY.

ICC) 

